YiWeakPtr.h

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// © You i Labs Inc. 2000-2017. All rights reserved.
#ifndef _YI_WEAK_PTR_H_
#define _YI_WEAK_PTR_H_

#include "smartptr/YiSharedPtr.h"
#include "utility/YiUtilities.h"

#include <memory>

template<typename YI_PTR_TYPE>
class CYIWeakPtr
{
    template<typename YI_OTHER_PTR_TYPE> friend class CYISharedPtr;
    template<typename YI_OTHER_PTR_TYPE> friend class CYIWeakPtr;

public:
    CYIWeakPtr();

    CYIWeakPtr(const CYIWeakPtr<YI_PTR_TYPE> &rOther);

    template<typename YI_OTHER_PTR_TYPE>
    CYIWeakPtr(const CYIWeakPtr<YI_OTHER_PTR_TYPE> &rOther);

    CYIWeakPtr(const CYISharedPtr<YI_PTR_TYPE> &rOther);

    CYIWeakPtr(const std::shared_ptr<YI_PTR_TYPE> &rOther);

    template<typename YI_OTHER_PTR_TYPE>
    CYIWeakPtr(const std::weak_ptr<YI_OTHER_PTR_TYPE> &rOther);

    template<typename YI_OTHER_PTR_TYPE>
    CYIWeakPtr(const CYISharedPtr<YI_OTHER_PTR_TYPE> &rOther);

    ~CYIWeakPtr();

    void Reset();

    YI_PTR_TYPE *Get() const;

    bool IsNull() const;

    uint32_t GetUseCount() const;

    void Swap(CYIWeakPtr<YI_PTR_TYPE> &rPtr);

    CYISharedPtr<YI_PTR_TYPE> ToStrongPtr() const;

    bool operator!() const;

    operator bool() const;

    template<typename YI_OTHER_PTR_TYPE>
    operator std::weak_ptr<YI_OTHER_PTR_TYPE>() const;

    CYIWeakPtr<YI_PTR_TYPE> &operator=(const CYIWeakPtr<YI_PTR_TYPE> &rOther);

    template<typename YI_OTHER_PTR_TYPE>
    CYIWeakPtr<YI_PTR_TYPE> &operator=(const CYIWeakPtr<YI_OTHER_PTR_TYPE> &rOther);

    CYIWeakPtr<YI_PTR_TYPE> &operator=(const CYISharedPtr<YI_PTR_TYPE> &rOther);

    template<typename YI_OTHER_PTR_TYPE>
    CYIWeakPtr<YI_PTR_TYPE> &operator=(const CYISharedPtr<YI_OTHER_PTR_TYPE> &rOther);

    template<typename YI_OTHER_PTR_TYPE>
    CYIWeakPtr<YI_PTR_TYPE> &operator=(const std::shared_ptr<YI_OTHER_PTR_TYPE> &rOther);

private:
    std::weak_ptr<YI_PTR_TYPE> m_pWeak;
};

#include "smartptr/YiWeakPtr.inl"

#endif /* _YI_WEAK_PTR_H_ */